 <html>
<body>
<div id="sampleDiv" style="width: 100px; background-color: Gray;">
Zoom Me
</div>
<button onclick="sampleDiv.style.zoom='300%'">Zoom 300%</button>
<button onclick="sampleDiv.style.zoom='200%'">Zoom 200%</button>
<button onclick="sampleDiv.style.zoom='100%'">Zoom 100%</button>
</body>
</html>